File and directory permissions - Joomla! Forum - community, help and support

we installed joomla through fantastico, sets own settings.
afterwards began attempting make administrative changes found files not writable.
what default chmod settings files , directories?

in general: files = 644
and directories = 755

see: faq: joomla! permissions overview
http://forum.joomla.org/index.php/topic,121470.0.html